Adult SMA REACH is a data collection study aiming to gain a better understanding of the impact of standards of care and new treatments on the natural history of Spinal Muscular Atrophy (SMA). This study is sponsored by The Newcastle upon Tyne Hospitals NHS Foundation Trust. Adult SMA REACH is funded by Biogen and Roche. Currently, there are three drug treatments available for SMA in the UK: Zolgensma, Nusinersen and Risdiplam. Zolgensma is the only approved drug - Nusinersen and Risdiplam are currently available as part of Managed Access Agreements (MAA).